Closing and locking device for sliding doors.



- J. KOHN.

CLOSING ANDLOGKING DEVICE FOR SLIDING DOORS.

APPLICATION FILED 0GT.22,1918.

1,094,909, Patented Apr. 28, 1914.

3 SHEETS-SHEET 1.

W/T/VE88E8 4% p W MW ATTORNEY J. KOHN.

CLOSING AND LOOKING DEVICE FORSLIDING DOORS.

APPLICATION FILED OCT. 22, 1913.

Patented Apr. 28, 1914.

3 SHEETS-SHEET 2.

INVENTO J. KOHN.

CLOSING AND LOCKING DEVICE FOR SLIDING DOORS.

APPLIGATION FILED 001:.22, 1913.

1,094,909, Patented Apr. 28, 1914.

3 SHEETS-SHEET 3.

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STATES PA @FFTQE JACOB KOHN, OF NEW YORK, N. Y.

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To (/7? 107mm it may concern Be it known that I, JACOB KOIIN, a sub jcctof the King of Hungary, and resident of the city of New York, in thecounty of New York and State of New York, have invented certain new anduseful Improvements in Closing and Looking Devices for Sliding Doors, ofwhich the following is a specification.

The present invention relates to slidingdoor closing and lockingdevices,'and is specially adapted for use in connection with the doorsleading to elevator shafts and the like, although not limited to thatuse.

The main object of the present invention is to provide a simple,inexpensive and efficient lock for a sliding door, said lock coopcratingwith a device for moving the said door to closing position, means beingprovided in said lock for holding said last named device, at will,against closing movemont.

Another object of the invention is to provide a device of this characterwhich can be manufactured on a commercial scale, or in other words onewhich is not so diflicult to produce as to be beyond the reasonable costof such an article.

lVith these and other objects in view,

which will more fully appear as the nature of the invention is betterunderstood, the same consists in the combination, arrangement andconstruction of parts hereinafter fully described, pointed out in theappended claims and illustrated in the accompanying drawings, it beingunderstood that many changes may be made in the size and propor tion ofthe several parts and details of construction within the scope of theappended claims without departing from the spirit or sacrificing any ofthe advantages of the invention.

Two of the many possible embodiments of the invention are illustrated inthe accompanying drawings, in which Figure 1 is a view in elevation ofthe slid ing door of an elevator shaft with the device of the presentinvention applied thereto, the view being taken from the inner orcar-side of the elevator shaft and the door being in its closedposition; Fig. 2 is an enlarged front elevation of the lock with theparts in their closing positions, its cover being we moved to moreclearly show the interior construction; Fig. 3 is a similar elevation ofthe lock with the parts in diiferent positions;

Specification of Letters Patent.

Application filed October 22, 1913.

Patented Apr. 28, 1914. Serial No. 796,658.

Fig. 4 is a horizontal section taken through the means which moves thedoor to its closing position; Fig. 5 is a plan view of this means F 1g.6 is a side elevation thereof; Fig. 7 1s a section taken through adetail of construction; Fig. 8 is a fragmentary view in elevation of asliding door equipped with a modification of the invention; and Fig. 91s a horizontal section taken through a modified means for shifting thedoor toward and into closing position.

Referring now more particularly to Figs. 1 to 7, inclusive, the numeral10 indicates the slidingdoor of an elevator shaft, which together with astationary door 11 extends substantially throughout the width of theopening of the elevator shaft, the door 11 being hinged at 12, 12 to thedoor frame, thereby permitting both doors to be swung outwardly as awhole so as to permit large objects to be loaded upon and to be takenfrom the elevator car. The locking and closing mechanism of the door isapplied to the inner or car-side of the door. The lock comprises acasing 13, that is attached by screws, or otherwise, to thesliding-door, and contains a catch let, in the form of a dog, that ispivoted at 15 to the casing, and provided near its lower free end with ahorizontal extension 16, having a rounded edge 17 for a purposehereinafter to be described. A spring 18 bears against one end of theeasing and the catch, and tends to force the latter toward the frontedge of the lock casing. A catch actuating lever 19 is fulcrumed at 19to the lock casing, one of its arms, denoted by the numeral 20, beingadapted to contact with the said catch, while its other arm, denoted bythe numeral 21, ex tends through an aperture 22 in the lock casing outof the latter, where it is connected with an operating rod 23, thatprojects through a guide 24 and extends throughout the width of thedoor. The arm of the catch actuating lever carries a lug 25, to which isfastened one end of a spring 26, the other end of which is secured to astop 27. This spring tends to draw the lug 25 into contact with theperipheral face of a disk tumbler 28, that turns around a pivot 29. Thetumbler is provided with a substantially triangular notch 30, adapted tocooperate with the door closing means hereinafter to be described, andwith a notch 31, into which the lug 25 abovementioned is seated when thesaid tumbler is shifted iround its pivot in a manner hereinafter o bespecified. The stop 27 is disposed within a recess 32 in the saidtumbler, the edge 32} oi said recess bez'iring against; said stop whenthe parts of the lock mechanism occupy the positions shown in Fig. 2 ofthe drawings, in which the door is in its closed position. in its frontand upper edges the lock casing is provided with an 01 ening 3i, r ughwhich extends into the same a link i hat is tulcruined at 36 to the lockcasing, its inner wedge-shaped end 37 engaging the horizontal extension16 of the catch it when the door is closed, and the notch 30 in the disktumbler 38 when thedoor is open. 'ilhe outer end of the link 35 isconnected with one end of a link 38 by the int r-media y of a doorclosing device pres ently to be described. The other end of the link.3?} is pivoted a t 89 to a brackeet et-t), that its attached to thestationary door 11. The door closing mechanism, which. connects thelinks and comprises, broadly sp raking, a sprint o other suitable meanstor causing a swin f Means 1 i ing motion oi said two links. i'nay beprovided, for instance in the form of a check, which prevents theslamming oil the door. Before proceeding to describe the door closingmeans in detail, it is to be ol served that any suitable door check andcloser connecting the links and 38 may be made use of, the one hereindescribed being shown liar purposes of illustratioi only.

ll ith reference to 4t to (5, inclusive, ie numeral designates a casing,comprising a spring chamber l2 and a liquid cham- The spring chamber isprovided vith a slot tt, through which is inserted the same the innerend of the link 'ie letter being attached to said casing by 41-5 andscrews 45, or in any other itable manner. The outer end of the link 35is also adapted to be inserted through the slot -.t-.tinto the saidspring chamber and to more ireely within a slot i6, that extends in aplar e The end o the link 35, whi-h is disposeo v'thin the springchamber 42, is provided with a square hole l-T, in which is seated thesquared portion 48 of a shat't it), which extends through the springchamber into the liquid chamber, as clearly shown in l ig. oi? thedrawings.

The numeral 50 designates a sleeve, having a groove :t'ormed in. itsside, and pro vided upon its upper end with a ratchet wheel tlat isengaged. by a pawl 53, which pivoted to the link The inner end oil? aspiral spring Si in the spring-chainher is lniok-shaped, and is seatedin the groove 51 in the sleeve 50, the other end spring being attachedto the side of h spring chamber. in the liquid chamber disposed a piston55, that is connected l intermediary of a pitinan 56 with a at rightangles to that of the slot bringing crank 57, which is attached to thelower end of the shaft if). The piston is provided with a port 58 in itsfront end, controlled by a 'alve an aperture 60 being provided in therear end of the piston. The spaces in front and rear ot the piston areadapted to communicate through a iassage 61, which is controlled by avalve 62, to govern the flow of the liquid and the extent of theresistance of the same to the door closing operation oi? the spring 5+1;Suitable packing means (52 are provided for preventing the passage ofthe liquid from the liquid chamber into the spring chamber. The springchamber is closed by a cover (33, wnich is provided. with an extensionti l, covering the slot l in the spring chamber. To prevent frictionbetween the link 35 and the spring, a washer is disposed between thespring and said link. By turning the ratchet by mains of a key, theinitial force of the spring 5%t may be regulated as desired, and itwill. be seen that the force of the said spring ah 'a vs tends to turnthe link in the direction of the arrow indicated in Fig. 1 of thedrawings, that is to say away from th link 38. The movement of the doorclosing means, which as above described is attached to the link 38, isguided by a plate 66, that is attached to the inner face of thestationary door 11, and provided with an arc-shaped slot 67, into whichprojects a lug (38, that is carried by the casing ll When thesliding-door is in its cl osel position, the links and 38 are in thepositions shown in Fig. l of the drawings, in which the innerwedge-shaped end 37 of the link 35 is in engagement with the horizontalex tension 16 of the catch l t, such engagement;- being maintained bythe spring 18. Obviously the sliding door cannot be opened thus from theloft side of the elevator shaft. To open the door, the operator swingsthe arm 21 of the actuating lever 19 in the direction of the arrow shownin Fig. 2 of the drawings, thereby disengaging the catch l-t from thelink As soon as this disengagnaneuttakes place, the door 10 can beshifted to its open position, the links 35 and 38 then approaching eachother, and the door closing means moving in an arc-shaped path until itslug GS abuts against the outer end ()9 oi the slot 6'7. in the meantimethe wedgesiaped end 3? of the link is shifted around its pivot 36 and.is seated in the notch 30. lVhen the door reaches its fully openposition, the tumbler 28 has been shifted by the link around its pivot29, thereby the notch 31 into registering posi tion with the lug 25 uponthe lever 19, the spring 26 then seating the said lug in the said notch,thus preventing disengagement of the link from the tumlialer whereby thedoor is held locked in its 0 )Qil position.

In order to close the door, the operator shifts by the intermediary ofthe rod 23 the arm 21 of the lever 19 in a direction oppo site to thearrow shown in Fig. 2 of the drawings, thereby releasing the tumbler 28.The spring of the door closing means, which has been in opening the doorcompressed, thus rendered operative, causing the links and 38 to moveaway from each other with the result that the door is moved toward itsclosing position. The end 3"? of the link 35 is thus disengaged from thetumbler, and the latter shifted until the edge 33 of its recess 32 abutsagainst the stop 27. The wedge-shaped end 3? of the link 35 rides overthe rounded edge 17 of the extension 16 of the catch lat, and is broughtinto the position shown in Fig. 2 of the drawings. The mechanism in theliquid chamber of the door closing means prevents a slamming of thedoor. While the door is moving toward its open position, the piston 55moves in the direction of the arrow shown in Fig. l of the drawings,liquid being freely admitted from the front of the piston to the rear ofthe same. lVhen, however, the door is closed by the action of the springor, the valve 59 covers the port 58 and the liquid is forced from thefront of the piston to the rear of the same through the passage 61,slamming being prevented by the resistance of the liquid to theoperation of the piston.

A modification of the invention is shown in Figs. 8 and 9 of thedrawings, dif ering from the one above described in that the doorclosing device lacks the means which prevents the slamming of the door,or in other words the casing 4L1 lacks the liquid chamber and the meanslocated therein; otherwise the construction of the device is the same,its operation being also identical with the one above described. Thismodification is specially adapted for use in connection with heavydoors.

While her in a stationary door 11 has been described, to which the link38 is fastened by the intermediary of the bracket d0, it is obvious thatthe invention may be applied to sliding-doors which are not com binedwith stationary doors. in the latter case the bracket lO is obviouslyfastened to the wall of the elevator shaft or to the door frame.

ll hat I claim is 1. In a. device of the character described, thecombination with a door frame and a sliding door, of a link pivoted tosaid door, a link fulcrumed to said frame, means con necting said twolinks tending in all positions of said door to move the latter intoclosing position, and a locking member mounted upon said door forlocking said links against motion.

In a device of the character described, the combination with a doorframe and a sliding door, of a link pivoted to said door,

a link fulcrumed to said frame, means con necting said two links tendingin all positions of said door to move the latter into closing position,and a locking member mounted upon said door adapted-to engage the linkpivoted to said door and to hold the latter in its closed position.

3. In a device of the character described, the combination with a doorframe and a sliding door, of a link pivoted to said door, a linkfulcrumed to said frame, means connecting said two links tending to movesaid door into closing position, a locking member mounted upon said dooradapted to engage the link pivoted to said door and to hold the latterin its closed position, and mean adapted to engage said late named linkwhen the door is in its open position to lock it therein.

4. In a device of the character described, the combination with a doorframe and a sliding door, of a link pivoted to said door, a linkfulcrumed to said frame, means connecting said two links tending to movesaid door into closing position, a locking member mounted upon said dooradapted to engage the link upon said door and to hold thereby the latterin closing position, means for disengaging said locking member from saidlast named link to move said door to open position, and means upon saiddoor adapted to engage the link thereon for automatically locking saidlinks against motion when said door is in its open position.

5. In a device of the character described, the combination with a doorframe and a sliding door, of means connecting said two elements tendingto move said door into closing position, and a locking means upon saiddoor adapted to engage said first named means for locking the latteragainst motion when said door is both in its fully open and closedpositions.

6. In a device of the character described, the combination with a doorframe and a sliding door, of a link pivoted to said door, a linkfulcrumed to said frame, means connecting said two links tending to movesaid door into closing position, a lock casing mounted upon said doorhaving an aperture through which the link pivoted to said door projects,a spring pressed catch in said casing adapted to engage the linkprojecting into the same for holding the latter in closing position, alever in said casing adapted to disengage said catch from said link,said lever being provided with a lug, and a rotary tumbler having tworecesses, one of the same being adapted to be engaged by the link uponsaid door and the other by said lug when the door is in its openposition, whereby said links are locked against closing movement.

7. In a device of the character described, the combination with a doorframe and a sliding door, of means connecting said two elements tendingto move said door into (dosing position, locking means mounted upon saiddoor for looking said first named mean against motion when said door isboth in its :lfuily open and closed positions, and means for guiding themotion of said door closing means.

8. in a device oi the eharaeter described, the combination with a doorframe and a sliding door, of a link pivoted to said door, a link:tnierinned to said door frame, means connecting said two links tendingto move masses said door into elosing position, a locking member mountedupon said door for looking said links against motion, and means forretarding the closing movement of said first mentioned means.

igned at New York, in the county of New York, and State of New York,this l ith day of October, A. D. 1913.

JACOB KUHN.

Witnesses S. BIRNBAUM, SIGMUND Hnnzoo.

fiopies of this patent may be obtained for five cents each, byaddressing the Commissioner of Patents, Washington, D. G.

